Duolingo 14 Day Streak Goal Checkpoint Reveal Animation

The animation begins with a horizontal calendar timeline. An orange progress bar extends to the right to reach the '14' day milestone card. Upon contact, the card pops up with a springy scale animation, turning orange and displaying a streak flame icon. A success message fades in underneath. After a brief pause, the entire timeline slides to the left: the '14' card moves out of focus, the '30' card shifts to the center and springs into a highlighted orange state, and a new '40' card enters from the right. Finally, a motivational prompt fades in, accompanied by a blue 'Continue' button sliding up from the bottom.